Ground Short Inspection

Wiring diagram:

CAN communication system <Ref. to WIRING DIAGRAM , CAN Communication System.>

Fig 1: Power Steering Communication Diagram (1 Of 2)

Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Power Steering Communication Diagram (2 Of 2)

Courtesy of SUBARU OF AMERICA, INC.

NOTE: Main wiring harness or related lines may be shorted to ground, or shorted to ground in one of the control modules.

Step	Check	Yes	No
1 CHECK BETWEEN RELATED LINES AND MAIN WIRING HARNESS. Using the tester, measure the resistance between terminals. Connector & terminal (B40) No. 6 - Chassis ground: (B40) No. 14 - Chassis ground:	Is the resistance less than 10 Ω?	Go to step 2 .	Currently, it is normal.
2 CHECK CONTROL MODULE. With the tester connected, disconnect control module. NOTE: Disconnect the body integrated unit at the end. Connector & terminal (B40) No. 6 - Chassis ground: (B40) No. 14 - Chassis ground:	Did the resistance change to 10 Ω or more?	Replace the control module whose resistance has changed. When the value changed at disconnecting the body integrated unit, Go to step 3 .	Repair or replace the short circuit of the main wiring harness and related lines between body integrated unit and ECM.
3 CHECK BETWEEN MAIN WIRING HARNESSES. Using the tester, measure the resistance between terminals. Connector & terminal (i171) No. 22 - Chassis ground: (i171) No. 2 - Chassis ground:	Is the resistance less than 10 Ω?	Repair or replace the short circuit of the main wiring harness and related lines between ECM and body integrated unit.	Replace the body integrated unit. <Ref. to REMOVAL , Body Integrated Unit.>

Wiring diagram:

CAN communication system <Ref. to WIRING DIAGRAM , CAN Communication System.>

Fig 3: Keyless Access Communication Diagram

Courtesy of SUBARU OF AMERICA, INC.

NOTE: Main wiring harness or related lines may be shorted to ground, or shorted to ground in one of the control modules.

Step	Check	Yes	No
1 CHECK BETWEEN RELATED LINES AND MAIN WIRING HARNESS. Using the tester, measure the resistance between terminals. Connector & terminal (i188) No. 5 - Chassis ground: (i188) No. 6 - Chassis ground:	Is the resistance less than 10 Ω?	Go to step 2 .	Currently, it is normal.
2 CHECK CONTROL MODULE. With the tester connected, disconnect control module. NOTE: Disconnect the body integrated unit at the end. Connector & terminal (i188) No. 5 - Chassis ground: (i188) No. 6 - Chassis ground:	Did the resistance change to 10 Ω or more?	Replace the control module whose resistance has changed. When the value changed at disconnecting the body integrated unit, Go to step 3 .	Repair or replace the short circuit of the main wiring harness or related lines between body integrated unit and impact sensor.
3 CHECK BETWEEN MAIN WIRING HARNESSES. Using the tester, measure the resistance between terminals. Connector & terminal (B281) No. 31 - Chassis ground: (B281) No. 15 - Chassis ground:	Is the resistance less than 10 Ω?	Repair or replace the short circuit of the main wiring harness and related lines between ECM and body integrated unit.	Replace the body integrated unit. <Ref. to REMOVAL , Body Integrated Unit.>